Piston-ring tool



Oct. 23, 1928. 1,688,467

J. MATECHIK PISTON RING TOOL 'Filed May 5, 1927 ATTO NEY Patented Get. 23, V1928.

JOSEPH MATECHIK', or WEATHERLY, PENNSYLVANA.`r

yPiston;RING Toor..y

Application filed May 5J rllhis vinvention relates to piston ring tools and aims, among other objects, to provide a tool, through the use ofy which, apiston ring may be iirinly grippedadjacent to its ends and readily expanded to be put either in place upon a piston or removed t-herel'rlom.r

in the drawings illustrating a preferred eiubodin'ient of the invention:

Figure 1 is a side elevation ofthe improvet tool; y Figure 2 is a top plan thereof; and Figure 3 is a view similar to Figure 2, but with parts of the upper handles broken away, and showing the tool in expanded position.

1n carrying out the invention, two pairs of pliers 10 and 11 are provided having handles 12 and 13 and jaws 1st and 15, respectively. The handles 12 are spaced further from each other than are the handles 13, so that they may overlap the handles 18 and be pivotally connected thereto at their terminals by rivets 1G. By this arrangement it will be seen that the jaws 14 and 15 Ywill open and close in Vunison when the handles are actuated. In order that the jaws 14 and 15 may be brought into relatively close proximity to eacii other, the handles are bent laterally toward each other, as at 17 and 18, as shown 1n ll" ure 2.

Mounted for rocking movement on one of the handles 13 of the pliers 11, is shown a lever 19, which is suitably apertured near one end'to receive a pivot 'screw 20fabout which the lever rotates. A suitable lug 2l, which is internally screw-threaded to receive the pivot screw 20, also serves to space the lever from the handle, so that the lever may be freely rotated. The end of the lever 19, nearest xthe pivot 2O is provided vwith a cam surface which co-acts with a rolleil 23 mounted for rotation on the corresponding' handle 12 of the other pair of pliers 10. By rocking the lever about its pivot, it will be seen from the drawings that the pliers will swing` about their pivots 16 and be separated fromuor allowed to approach each other.

The handles l2 and 13, opposite to the ones on which the lever19 and rollers 23 are mounted, are each provided with a lug 2-/l to which the opposite ends of a contractile coil .spring 25 are connected, whichtends to hold the pliers inA their normal position, as shown in Figure 2. f To remove a ring from a piston, the ring is tirstmoved laterally in the groove to eX- pose the free ends of the ring beyond the 192i.. serial No. 189,029.

piston,.and ythe jaws 14 `and l`59are opened and placed over the ring kin th'eposition shown in Figure 2. The handles ofthe pliers are then actuated to close the jaws,which, due to the connection between the pliers, will grip the ring on each side `'of the joint with equal pressure. -Retaining the grip on the handles with one hand, the lever 19 is then rocked about its pivot 20 with the other hand, and by the action of the cam 22 against the roller 23, will move the pliers about their pivots 16, and force the ends of the ring apart when it can then be raised over the top of the piston. In order that the ring may be held in' expanded position with one hand, a seat 26 is formed on the lever 19 adjacent the end ot the cam portion 22, so that when the lever has been swung until it strikesV one of the handles 13, the roller will engage the seat 26, and hold the pliers in the position shown in Figure 3.

ln applying a ring to a piston, ther-ing is gripped and expanded in the same way as to remove it, when it is then placed over the piston and the lever rocked to the position shown in Figure 2. The work-engaging Vfaces of the jaws of each pair of'pliers are oppositely concaved, as'shown at 27, so that when the ring is gripped between them., the pressure will be applied near the' inner edges thereof, and thereby prevent the outer edges from chipping` or being marred in any way. y

F rom the foregoing description it can readily be. seen that a piston ring tool has been provided which is inexpensive to manun facture, easy to operate, and effective in its use. Y

Obviously the present invention is `not restricted to the particular embodiment thereof herein shown and described. Moreover, it y is not indispensable that'all the featuresof the invention befused conjointly, since they may be employed advantageously in various combinations` and sub-combinations.`

What is claimed is:

1. Atool of the character described, comprising, in combination, two pairs of pliers vconnected together, and means for forcing and holding the active ends ofthe pairs apart, including a roller on one pair and a pivoted lever on the other pair engageable with said roller.

2. A tool of the character described comprising, in combination, two .pairs of pliers connected together and having the abutting faces of each pair of jaws concaved.

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3. A pistonring tool comprising, in c0mbination, twin pliers pivotally connected together at the extremities of their handles to force the jaws of the pliers into simultaneous gripping engagement with the ends of a piston ring, a lever pivotally mounted on one of the handles of one of the pliers, a roller mounted on the connected handle of the other pliers, and a cam Jformed on said lever to eo-aet with said roller to force the jaw ends of the pairs of pliers apart to expand the ring.

4. A tool of the character described, coniprising, in combination, two pairs of pliers connected together to simultaneously -grip the ends of a split ringa lever on one of the pliers, a roller on the other pair, a cam on said lever to engage said roller to expand the ring, and means on the lever to engage 'the roller to hold thering in said expanded position. i

In testimony, that I claim the'foregoing as my own, I have hereto affixed mysignature. v JOSEPH MATE'CHK. 

